First we'll substitute  with
 with 

Then we can separate this.

Then we'll solve this.



Then we'll plug in to find the extraneous solutions (if any)

 
        
             
        
        
        
Answer:
No, it doesn't pass the vertical line test.
 
        
             
        
        
        
Step-by-step explanation:
here ,
 

now,
 
cosec(2-45°)=2
or,
1/sin(2-45°) =2
or,
1/sin2cos45°-cos2sin45=2
or,

or,
sorry I have that much qualifications to work on this question and hoping this much will make bit easy for you to solve it further 
 
        
             
        
        
        
You can use any letter but when you label it x you find x
        
             
        
        
        
Answer:
20
Step-by-step explanation:
<em>5+5+5+5</em>